Add ckanext-markdown_editor to tests, since it is required by api-catalog schema
Add ckanext-markdown_editor to tests, since it is required by api-catalog schema

vrk-kpa/ckanext-xroad_integration,vrk-kpa/ckanext-xroad_integration,vrk-kpa/ckanext-xroad_integration,vrk-kpa/ckanext-xroad_integration